Giant cross-plane seebeck effect in oxide metal semiconductor superlattices for spin-magnetic thermoelectric devices

A thermoelectric superlattice, comprising:

• a substrate;
• a buffer layer disposed on the substrate;
• at least one set of alternating layers of perovskites oxide La0.67Sr0.33MnO3 (LSMO) and LaMnO3 (LMO) disposed on the buffer layer;
• and
• a capping layer disposed on the at least one set of LSMO and LMO,
• the cross-plane electrical conductivity of the thermoelectric superlattice measured between the substrate and the capping layer having a value of at least 8×10−4 ohm−1−cm−1 measured at about 300K;
• and
• wherein each layer in the at least one set of alternating layers has a same thickness, and wherein said same thickness is 2-21 nm and wherein the thickness of the capping layer is 3-20 times said same thickness.